To provide an overload protection device which, while ensuring safety, allows maximum utilization of lifting performance of a work machine depending on an operating state.SOLUTION: An overload preventing device is mounted on a mobile work machine, and is provided with: a storage unit which stores lifting performance data in which lifting performance is configured for each operation state, and performance region data in which switching angles are configured that define performance regions, including a front region, a back region, and a side region; and a work machine control unit which controls operation of the mobile work machine on the basis of actual load and the lifting performance corresponding to the present operation state of the mobile work machine. Third lifting performance configured for a transition region, a first switching angle defining a boundary between the front region and the side region and a boundary between the back region and the side region when outriggers are in different states of deployment, and a second switching region defining a transition region in the side region are configured on the basis of stability calculation and strength factors such as jack strength.SELECTED DRAWING: Figure 9

    【課題】安定性を担保できるとともに、作業機の吊上げ性能を作業状態に応じて最大限に利用できる過負荷防止装置を提供する。【解決手段】過負荷防止装置は、移動式作業機に搭載されるものであって、作業状態ごとに吊上げ性能が設定されている吊上げ性能データと、前方領域、後方領域及び側方領域を含む性能領域を規定する切替角度が設定されている性能領域データとを記憶する記憶部と、前記移動式作業機の現在の作業状態に対応する前記吊上げ性能と実負荷とに基づいて移動式作業機の動作を制御する作業機制御部と、を備える。遷移領域に対して設定される第3の吊上げ性能、アウトリガーが異張出状態である場合に前方領域と側方領域の境界及び後方領域と側方領域の境界を規定する第1の切替角度、側方領域における遷移領域を規定する第2の切替角度は、安定度計算及びジャッキ強度などの強度要因に基づいて設定されている。【選択図】図9


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    Title :

    OVERLOAD PREVENTING DEVICE


    Additional title:

    過負荷防止装置


    Contributors:

    Publication date :

    2019-02-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



    OVERLOAD PREVENTING DEVICE

    FURUICHI KAZUHIRO | European Patent Office | 2020

    Free access

    OVERLOAD PREVENTING DEVICE

    FURUICHI KAZUHIRO | European Patent Office | 2019

    Free access

    Overload preventing device

    FURUICHI KAZUHIRO | European Patent Office | 2020

    Free access

    OVERLOAD PREVENTING DEVICE

    FURUICHI KAZUHIRO | European Patent Office | 2020

    Free access

    OVERLOAD PREVENTING DEVICE

    FURUICHI KAZUHIRO | European Patent Office | 2020

    Free access